Zte Z716BL - Installing the Micro-SIM Cards and the Battery

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Key
Function
Recent apps key
Touch to see the recently used apps.
Back key
Touch to go to the previous screen.
Volume key
Press or hold either end to turn the volume up or down.
NOTE:
The positions of the Recent apps key and the Back key are
interchangeable through the Home key > > Settings >
Navigation key.
Installing the micro-SIM Cards and the
Battery
Switch off your phone before installing or replacing the battery or
the micro-SIM cards.
1. Insert your fingernail into the slot at the bottom left of the back
cover and lift it up gently.
2. Hold the micro-SIM card with the cut corner oriented as
shown and slip it into the card holder.